Question

Cosmology

3. A strange hypothetical atom has only 5 energy levels that its electrons can occupy (instead of an infinite number). Determine how many spectral lines will appear in its spectrum. Show how you arrive at your answer by drawing a sketch similar to Figure 7-4 (but with no energy levels beyond n-5). [Hint: electrons can "jump" from any level onto any other level.] [4 points; from Chapter 7] 4. A strange star with a surface temperature of 5,000 K is composed of only hydrogen and sodium. As do most stars, it has an atmosphere that is cooler than the surface. Draw a sketch of the visible spectrum of the star, indicating the colors (or using color pencils or pens if you have them). Use Figures 7-2 & 7-3 as a guide; the format of your sketch should be as in one of the panels of Fig. 7-3, i.e., a strip with wavelength decreasing to the right. [4 points; from Chapter 7]

6

Answer 1

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